A branching fraction measurement of the B0→Ds+π- decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb-1. The branching fraction is found to be B(B0→Ds+π-)=(19.4±1.8 ± 1.3 ± 1.2) × 10 - 6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B→ D-π+, Ds+→K+K-π+ and D-→ K+π-π- branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/ fd is measured through B¯s0→Ds+π- and B→ D-π+ decays.
Measurement of the branching fraction of the B0-> Ds+pi- decay
Bassi, G.Membro del Collaboration Group
;Lusiani, A.Membro del Collaboration Group
;Morello, M. J.Membro del Collaboration Group
;Pajero, T.Membro del Collaboration Group
;Pica, L.Membro del Collaboration Group
;Ribatti, R.Membro del Collaboration Group
;
2021
Abstract
A branching fraction measurement of the B0→Ds+π- decay is presented using proton–proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of 5.0fb-1. The branching fraction is found to be B(B0→Ds+π-)=(19.4±1.8 ± 1.3 ± 1.2) × 10 - 6, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the B→ D-π+, Ds+→K+K-π+ and D-→ K+π-π- branching fractions. This is the most precise single measurement of this quantity to date. As this decay proceeds through a single amplitude involving a b→ u charged-current transition, the result provides information on non-factorisable strong interaction effects and the magnitude of the Cabibbo–Kobayashi–Maskawa matrix element Vub. Additionally, the collision energy dependence of the hadronisation-fraction ratio fs/ fd is measured through B¯s0→Ds+π- and B→ D-π+ decays.File | Dimensione | Formato | |
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Aaij2021_Article_MeasurementOfTheBranchingFract.pdf
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